Size and weight are big decision factors when you are trying to find the ideal camera for your needs.
In this section, we are going to illustrate the Panasonic ZS7 and Nikon S9100 side-by-side from the front, back and top in their relative dimensions. Panasonic ZS7 has external dimensions of 103 x 60 x 33 mm (4.06 x 2.36 x 1.3″) and weighs 218 g (0.48 lb / 7.69 oz) (including batteries). Nikon S9100 has external dimensions of 105 x 62 x 35 mm (4.13 x 2.44 x 1.38″) and weighs 214 g (0.47 lb / 7.55 oz) (including batteries).
Below you can see the front-view size comparison of the Panasonic ZS7 and the Nikon S9100. Panasonic ZS7 is clearly the smaller of the two cameras. Its body is 2mm narrower, 2mm shorter and 2mm thinner than Nikon S9100.
Here is the back view size comparison of the Panasonic ZS7 and Nikon S9100.
Now lets look at the top view comparison of Panasonic ZS7 and Nikon S9100.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Nikon S9100 is 4g lighter than the Panasonic ZS7 but we don't think this will make a significant difference.
Weather Sealing
Unfortunately neither the Panasonic Lumix DMC-ZS7 (Lumix DMC-TZ10) nor Nikon Coolpix S9100 provides any type of weather sealing in their bodies, so you have to give extra care especially when you are shooting outdoors. If weather sealing is a must-have feature for you, check these sections: Top Compact Cameras with Weather Sealing
LCD Screen Size and Features
Panasonic ZS7 and Nikon S9100's LCD screens have the same diagonal size of 3.00 inches.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.